1. General Model Information

Name: BLOCKPHOT 1.0 - Block canopy gross photosynthesis.

Acronym: BLOCKPHOT


Main medium: terrestrial
Main subject: biogeochemistry, agriculture
Organization level: bioceonosis
Type of model: ordinary differential equations
Main application:
Keywords: photosynthesis, crop, canopy, light interception, light microclimate, reflection

Contact:

Ir. J.G. Gijzen.
Wageningen Agricultural University, Dept. Horticulture, Haagsteeg 3, 6708 PM Wageningen, THE NETHERLANDS.
Phone: +31.317.482397
Fax: +31.317.484709
email: hans.gijzen@users.tbpt.wau.nl

Author(s):

Ir. J.G. Gijzen.

Abstract:

Canopy gross photosynthesis is calculated of a plant stand. The plant stand is represented as a block of given height, width, and depth. The model is an adapted version of the row crop model of Gijzen & Goudriaan (1989; Agric. For. Meteor. 48: 1-20). Diffuse and direct light distribution and absorption are calculated taking account of scattering and reflection. Leaf photosynthesis is calculated from absorbed light and integrated over the block.

Model parentage: HEDGEROW 1.0

Source of the AbstractCAMASE Register of Agro-ecosystems Models


II. Technical Information

II.1 Executables:

Operating System(s): Any computer. Contract necessary: No Costs: : None. Comments:

II.2 Source-code:

Programming Language(s): Microsoft FORTRAN.

II.3 Manuals:



II.4 Data:



III. Mathematical Information


III.1 Mathematics


III.2 Quantities

Rate variables: Photosynthetic active radiation absorption, leaf gross photosynthesis, crop gross photosynthesis.

State variables: -

III.2.1 Input

Leaf photosynthesis parameters, leaf area index, block width, height and depth, latitude, day of year, hour of day, fraction diffuse photosynthetic active radiation. Input check in model: No.

III.2.2 Output

Instantaneous crop gross photosynthesis, canopy photosynthetic active radiation absorption.
Basic spatial unit: m2.
Time interval of simulation: Instantaneous.

IV. References




V. Further information in the World-Wide-Web


VI. Additional remarks

Parentage: HEDGEROW 1.0
Last review of this document by: T. Gabele: Dec 9 1997
Status of the document:
last modified by Joachim Benz Mon Jul 2 18:31:37 CEST 2007

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